https://scholars.lib.ntu.edu.tw/handle/123456789/626786
標題: | An in-situ formed bifunctional layer for suppressing Li dendrite growth and stabilizing the solid electrolyte interphase layer of anode free lithium metal batteries | 作者: | Merso, Semaw Kebede Tekaligne, Teshager Mekonnen Weldeyohannes, Haile Hisho Nikodimos, Yosef Shitaw, Kassie Nigus Jiang, Shi Kai Huang, Chen Jui Wondimkun, Zewdu Tadesse Jote, Bikila Alemu Wichmann, Lennart Brunklaus, Gunther Winter, Martin Wu, She Huang Su, Wei Nien CHUNG-YUAN MOU Hwang, Bing Joe |
關鍵字: | Anode-free | Bifunctional material | Li nucleation | Li-Sr alloy | SrF particles 2 | 公開日期: | 10-十二月-2022 | 卷: | 56 | 來源出版物: | Journal of Energy Storage | 摘要: | Anode-free lithium metal batteries (AFLMBs) can achieve a high energy density. However, achieving high-capacity retention and Coulombic efficiency (CE) are challenging without a continuous Li supply from the Cu anode side. The lower CE and rapid capacity decay in AFLMBs are primarily due to non-uniform Li deposition and electrolyte decomposition during cycling. Herein, strontium fluoride (SrF2) nanoparticles are applied on Cu foils to attain the in-situ forming of a bifunctional interfacial layer, a Li-Sr alloy, and a LiF-rich SEI composite layer during Li plating. The derived Cu@SrF2 electrode has excellent plating/stripping stability and outstanding performance. AFLMB full cell (Cu@SrF2//NCM111) attains an average Coulombic efficiency (ACE) of 98.6 % and capacity retention of 51.0 % at the 60th cycle using a commercial carbonate-based electrolyte. In contrast, the bare AFLMB full cell (BCu//NCM111) only has an ACE of 94.9 % with a capacity retention of 10.2 % under the same conditions. The concept is proven in lithium metal batteries (LMBs). This strategy provides a simultaneous Li nucleation and formation of LiF-rich SEI layers, rendering it promising to realize AFLMBs and LMBs with long lifespans and high CE. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/626786 | ISSN: | 2352152X | DOI: | 10.1016/j.est.2022.105955 |
顯示於: | 化學系 |
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